Rolls and cylinders with a steel core for offset presses

Abstract

A cylinder for an offset printing press comprising a steel core and a heat-conducting layer arranged on the steel core in order to uniformly distribute localized steel core heating. The heat can consist of copper and can be arranged in or underneath a functional layer on the cylinder.

What is claimed is: 
     
       1. A cylinder for an offset printing press comprising a steel core, one or more rubber blankets arranged on the steel core, and a solid heat-conducting layer comprising a solid copper sleeve arranged internally of at least one of the one or more rubber blankets in order to uniformly distribute localized steel core heating wherein the copper sleeve of the heat conductive layer has a thickness of between approximately 1 mm and approximately 5 mm and has a thermal conductivity approximately eight times higher than a thermal conductivity of the steel core. 
     
     
       2. The cylinder according to  claim 1 , wherein the copper sleeve has a thickness of approximately 2 mm. 
     
     
       3. The cylinder according to  claim 1  wherein the cylinder is an offset transfer cylinder. 
     
     
       4. The cylinder according to  claim 1 , wherein the one or more rubber blankets includes a non-rubber supporting sleeve with a rubber layer structure arranged on the supporting sleeve and the heat-conducting layer is arranged on the supporting sleeve. 
     
     
       5. The cylinder according to  claim 1 , wherein the rubber blanket includes a non-rubber supporting sleeve with a rubber layer structure arranged on the supporting sleeve and the heat-conducting layer is arranged in the rubber layer structure. 
     
     
       6. The cylinder according to  claim 1 , wherein the cylinder is a roll in an inking unit of an offset press. 
     
     
       7. The cylinder according to  claim 1 , wherein the steel core has a tubular configuration. 
     
     
       8. The cylinder according to  claim 1 , wherein the steel core is a solid cylinder.